Half to edward h



(No Model.) I I. W. IHNE.

' GRINDING MILL.

110429.529. Paten-tedJu ne s. 1890.

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NITED STATES PATENT OFFICE.

F REDERIGK VVILLIAIWI IHNE, OF KANSAS CITY, MISSOURI, ASSIGNOR OF ONE- I HALF TO EDWARD H. BONTON, OF SAME PLACE.

GRINDING-MILL.

SPECIFICATION formingpart of Letters Patent N0. 429,529, dated June 3, 1890. Application filed November 26, 1389. Serial No. 331,593. (No model.)

T on whom it may concern.-

Be it known that I, FREDERICK WILLIAM IHNE, of Kansas City, in the county of J ackson and State of Missouri, have invented a certainnew and usefulImprovementin Grinding- Mills, of which the following is a full,clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to an improved mill for grinding or reducing such substances as barytes, pariswhite, kaolin, feldspar, white lead, ocher, terra di sienna, iron paint, boneblack, mineral black, 850.; and my invention consists in features of novelty hereinafter fully described, and pointed out in the claims. Figure I is a vertical section through my improved machine, taken on line I I, Fig. II. Fig. II is a horizontal section taken on line II II, Fig. I, and showing the working parts and the tub in top view, the shaft only being in section.

Referring to the drawings, 1 represents a suitable frame-work, upon which is placed a tank or tub 2.

3 represents a central shaft passing through the tank and stepped into a bearing 4 beneath the tank. This shaft is provided with suitable mechanism 5,'by which it is turned or revolved.

6 represents a top cross-piece for supporting the upper end of the shaft.

7 represents a sleeve surrounding the shaft and extending from the bottom of the tub to a point above the tub, and its function is Y to keep the water and other contents of the tub away from the shaft.

8 represents a stationary grinding stone or member located in the bottom of the tub, and having a central socket or opening 9 for the passage of the shaft and the sleeve, and in this opening around the sleeve is placed a rubber or other suitable ring 10 to keep the contents of the tub from reaching the connection between the sleeve and the bottom of the tub, where it might if the ring were not used eat through and fall upon the operating mechanism.

11 represents a spider secured rigidly to 50 the shaft 3 above the tub. The arms 12 of this spider are provided with downwardlyextending stems or rods 13, which are preferably made of wood or hard rubber, so as not to discolor the material being acted upon. I have shown three arms 12, each provided with 5 5 a stem or rod 13, but of course either more or less could be used. On the lower end of each rod is a stone or, grinding memberl4. These grinding members rest upon the stone 8 of their own weight, and it will be seen that when the shaft 3 is turned these members will be revolved or turned around the tub on the stone 8 and the material between these members and the stone 8 is ground to a fine powder, and as it escapes from between the members and the stone it rises in the tank-(which is kept filled with water) and floats off through a spout 15, which may be provided with a screen 16. The arms 12 are made of different lengths, as shown in Fig. 7c II, so that the members 14 will be made to cover the entire surface of the member 8, one

of the members 14 being placed so that its inner periphery will always be over the center of the working part of member 8, another member 14 being thrown farther out, and the other being thrown still farther out, so that its periphery will always be over or nearly over the periphery of the member 8. Thus the entire working-surface of the stone 8 is util- 8o ized, and its working -surface is increased over what it would be were the arms 12 all of the same length, so that the members 14 would have to follow one in the path of the other and the member 8 be only wide enough for this path. The working-surface is also increased by making a loose connection between the lower ends of the stems 13 and the members 14. This Iprefer to accomplish by forming enlarged sockets 16 in the members '90 and placing therein rings 17, which are perforated to receive the stems, as shown plainly in Fig. I. There is a loose fit between the rings and the stems, which allows the members 14 to rock slightly where necessary, as when 5 large lumps of the material being worked get between the members and the stone 8, and this loose connection between the stems and the members 14 also allows them to revolve around the stems or on their own axes, as well I00 as around the shaft 3. By this arrangement the working capacity of the machine is very materially increased.

18 represents a pipe through which the material is deposited into the tub. This pipe preferably connects with the tub just above the member 8, so that the material is deposited into the tub well down beneath the surface of the water, and the difiiculty of part of the material passing on the surface of the water to the spout 15, which would result if the material were deposited on the surface of the water at the top of the tub, is avoided. By depositing the material down low in the tub even the fine particles are not likely to rise through the water before being operated upon and reduced to a still finer condition.

19 represents aman-head closing an opening 20 in the tub, by means of which the tub may be cleaned or freed of its contents when desired.

By providing a tub which is adapted to hold water or other liquid and locating the grinding members therein the apparatus can be used as a grinding and floating mill, and by feeding the material slowly-to the action of the grinding members it will be rapidly and finely pulverized, and as it becomes finely pulverized will float to the surface and be carried off through the spout.

I claim as my invention 1. In a grinding-machine, the combination of a tub, an operating-shaft, a spider secured to the shaft, a stationary grinding member located in the tub, stems or rods depending from the spider, movable grinding members resting on the stationary member and having enlarged sockets into which the lower ends of said stems enter, and perforated rings placed within said sockets and receiving the ends of the stems, substantially as and for the purpose set forth.

2. In a grinding-machine, the combination of a tub, a stationary grinding member in the tub, an operating-shaft, a spider secured to the shaft, stems or rods depending from the spider, movable grinding members having enlarged sockets, and rings having enlarged perforations receiving said stems, substantially as and for the purpose set forth.

F. XVILLIAM IHNE.

In presence of E. S. KNIGHT, THos. KNIGHT. 

